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MultiVOIP User Guide T1 PhoneBook Configuration
297
Alternate Routing Field Definitions
Field
Name
Values Description
Alternate
IP
Address
n.n.n.n
where
n= 0-255
Alternate destination for outbound data traffic in
case of excessive delay in data transmission.
Round
Trip
Delay
milliseconds The Round Trip Delay is the criterion for judging
when a data pathway is considered blocked. When
the delay exceeds the threshold specified here, the
data stream will be diverted to the alternate
destination specified as the Alternate IP Address.
The Alternate Routing function facilitates PSTN Failover protection, that is, it allows
you to re-route voip calls automatically over the PSTN if the voip system fails. The
MultiVOIP can be programmed to respond to excessive delays in the transmission of
voice packets, which the MultiVOIP interprets as a failure of the IP network. Upon
detecting an excessive delay in transmission of voice packets (overly high “latency”
in the network) the MultiVOIP diverts the call to another IP address, which itself is
connected to the PSTN (for example, via an FXO port on the self-same MultiVOIP
could be connected to the PSTN).
IP
NETWORK
FXS
FXO
VOIP
VOIP
PBX
PSTN Line
1. Call originates.
2. IP network fails.
3. Call diverts to
Alt IP address in voip
accessing PSTN line.
4. Call completed
via PSTN.
PSTN Failover Feature. The MultiVOIP can be programmed to divert calls to the
PSTN temporarily in case the IP network fails.